If you have weak erections, masturbating aggressively can be potentially dangerous. I believe I've caused myself a minor injury from doing this chronically over the last 5 months. I hope it's not Peyronie's, but I'm getting pain in the sides of my penis and the girth has narrowed at the base. Not exactly what you need if you suffer with PSSD

PSSD Since March 2016 after 4 weeks on SertralineConditioned worsened and peaked in April, since then possibly seen a 20% improvementWould be useful for data collection if people could add their histories in their signature